FortiAuthenticator 6.6.06.6.10/8.0.08.0.3 Auth Bypass (Authz) Vulnerability
CVE-2026-126243 Published on November 11, 2026

A incorrect authorization vulnerability in Fortinet FortiAuthenticator 8.0.0 through 8.0.3, FortiAuthenticator 6.6.0 through 6.6.10 may allow an attacker to bypass authentication and gain unauthorized access. Full impersonation however requires the attacker to obtain pre-required id and data via other means.

NVD

Vulnerability Analysis

CVE-2026-126243 can be exploited with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
HIGH
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is an AuthZ Vulnerability?

The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

CVE-2026-126243 has been classified to as an AuthZ vulnerability or weakness.


Products Associated with CVE-2026-126243

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Fortinet Fortiauthenticator

Affected Versions

Fortinet FortiAuthenticator: